Nikolas Cruz told a detective that a 'demon voice' came to him in Dollar Tree and told him to 'burn, kill and destroy' the night before the Parkland shooting

Prosecutors released a 216-page transcript of Nikolas Cruz's post-shooting statement on Monday.

The 19-year-old is currently awaiting trial on capital murder charges for allegedly killing 17 at Marjory Stoneman Douglas High School in Parkland, Florida in February.

In his conversation with Broward sheriff's Detective John Curcio, Cruz said a demon came to him in a Dollar Tree and told him to carry out the massacre.

He also confessed to being suicidal after his mother died, and said he wanted officers to kill him.

Florida school shooting suspect Nikolas Cruz told a detective that a demon in his head told him to burn, kill, and destroy, and that he thought about going to a park to kill people about a week before 17 people were gunned down at the school, according to a recently released transcript of his interrogation.

During the more than 11 hours of questioning by Broward sheriff's Detective John Curcio, Cruz usually answered in short sentences or nodded yes or no, speaking so softly that the detective repeatedly told him to speak up. Twice when Curcio left the room, Cruz, 19, cursed at himself and said that he wanted to die and that he deserved to die.

"You're nothin'," Cruz told himself, followed by cursing.

Prosecutors and defense attorneys will pore over the interrogation if Cruz attempts an insanity defense or for mitigating factors if he is convicted and faces the death penalty. Cruz's attorneys have said he would plead guilty in exchange for a sentence of life without parole.

Prosecutors released the 216-page, heavily redacted transcript of Cruz's post-shooting statement on Monday after a judge ruled last month that nonconfession portions should be made public.

The interrogation began about four hours after the February 14 shooting at Marjory Stoneman Douglas High School in Parkland and about 2.5 hours after Cruz was captured as he walked down a nearby street.

The Associated Press and other media had sought the statement's release under Florida's broad public records laws. Cruz's attorneys had wanted it suppressed, saying its disclosure could hinder his right to a fair trial.

'The voice' told him: 'Burn. Kill. Destroy.'

A memorial is seen outside of Marjory Stoneman Douglas High School on February 28, 2018 — the first day students returned to school after the shooting. Reuters/Mary Beth Koeth

Cruz's statements about the shooting are blacked out, but the transcript is otherwise wide-ranging, dealing with the death of Cruz's parents, his penchant for killing animals, his former girlfriend, his brother, guns, suicide attempts and, especially, "the voice."

He told Curcio the voice appeared after his father died about 15 years ago but got worse after his mother died of pneumonia in November.

Cruz described the voice as a male, about his age, and said the only person he ever told about it was his brother.

Curcio asked what the voice told him.

"Burn. Kill. Destroy," Cruz responded.

"Burn, kill, destroy what?" the detective asked.

"Anything," Cruz responded.

He told Curcio that he had to fight the voice from taking over, that it was always bad. Curcio questioned that, asking how it could always be bad if Cruz had held down a job at a discount store for two years.

"The voice is in here," he said, apparently pointing to his head. "And then it's me. It's just regular me trying to be a good person." Curcio said everyone has a good and bad side.

"Do they really?" Cruz asked.

He said the voice tried to get him to shoot people at a park a week earlier. Or maybe it was three. Cruz couldn't remember exactly, but he didn't want to do it. Curcio asked why he didn't.

"I ... I don't know," he said.

Cruz said that the voice came back to him the night before the Parkland shooting, while he was shopping at a Dollar Tree. This time he followed the demon's orders.

$4,000 on guns and ammo

Cruz told Curcio he wanted to join the Army to be a Ranger but he failed the written exam "because I was stupid."

Cruz said he bought his first gun at 18, because he was afraid of the demon voice in his head. He estimated that he spent about $4,000 on guns and ammunition over the years, and that his mom was with him for most of these purchases.

The AR-15 he used in the Parkland shooting was bought a year before the attack. Cruz said he got it because it was "cool looking" and "to feel safe".

Cruz said he tried to kill himself with an over-the-counter pain reliever after his mom died a few months before the shooting and years earlier had tried to drink himself to death because he was lonely.

"You don't have a lot of friends?" Curcio asked.

"No," Cruz replied, saying he goes fishing with the demon.

Curcio told Cruz he doesn't believe the voice exists, but Cruz insisted it was there and said he wanted to see a psychiatrist.

At the end of the interrogation, the detective let Cruz's 18-year-old brother into the room.